The radiator cap is an essential part of an upgraded cooling system. Radium caps are engineered to safely improve cooling efficiency by managing the boiling temperature. A higher radiator pressure effectively raises the coolant boiling point, providing an extra safety margin and preventing air pocket cavitation at the water pump.

NOTE: Traditionally, "radiator" caps are mounted to the radiator but can also be found on coolant expansion tanks.

Each OEM replacement radiator cap is manufactured from stamped stainless steel for durability. All 18-0076-X1X radiator caps are electroplated black. Unlike OEM caps which use natural rubber gaskets, these radiator caps feature premium silicone sealing elements for long lasting durability.

PRESSURE

Available with 3 different pressure relief springs:

1. 1.1Bar (16.0psi)
2. 1.3Bar (18.9psi)
3. 1.5Bar (21.8psi)

TYPES

Radium radiator caps are designed for mini size (32mm ID) radiator necks only. Available in 2 common styles (Type-A and Type-B).

Please confirm what style your application uses prior to ordering.

NOTE: Radium Engineering coolant expansion tanks require a Type-A style radiator cap.

SPECIFICATIONS

• Material: Stainless Steel
• Sealing Gaskets: Silicone
• Pressure: 1.1, 1.3, 1.5 Bar
• Design Structure: Type-A, Type-B
• Construction: Metal Stamping
• Surface Finish: Black Electroplate

Vehicle Fitment:

• 1990-1993 Acura Integra
• 1991-2005 Acura NSX
• 1990-1993 Honda Accord
• 1988-1991 & 2016-up Honda Civic
• 1988-1991 Honda CRX
• 1992-2001 Honda Prelude
• 2003-2008 Infiniti G35
• 2008-up Infiniti G37
• 2014-up Infiniti Q50
• 2014-up Infiniti Q60
• 1992-2000 Lexus SC400
• 1990-1995 Mazda Cosmo
• 1990-2005 Mazda Miata
• 2006-up Mazda MX-5
• 1986-2002 Mazda RX-7
• 2004-2011 Mazda RX-8
• 1991-1999 Mitsubishi 3000GT
• 1990-1999 Mitsubishi Eclipse
• 2002-up Mitsubishi Lancer/EVO
• 1989-1998 Nissan 180SX
• 1989-1998 Nissan 200SX
• 1989-1998 Nissan 240SX
• 1990-1996 Nissan 300ZX
• 2003-2009 Nissan 350Z
• 2009-up Nissan 370Z
• 1988-1994 Nissan Cefiro
• 2005-up Nissan Frontier
• 2009-up Nissan GT-R
• 1989-2002 Nissan Laurel
• 1989-2002 Nissan Silvia
• 1989-2002 Nissan Skyline
• 2005-2006 Saab 9-2X
• 1993-up Subaru Impreza
• 1990-up Subaru Legacy
• 2015-up Subaru WRX STi
• 2015-up Subaru WRX
• 1982-1995 Toyota Celica
• 1985-1995 Toyota MR2
• 1986-1992 Toyota Supra
• Radium Coolant Expansion Tank